[Bug runtime/11641] FAIL: fib (19 1) backtrace from uretprobe fails

[fche at redhat dot com]

------- Additional Comments From fche at redhat dot com  2010-06-11 19:43 -------

> The reference of GET_PC_URETPROBE_NONE in stack.c is guarded by
> STAPCONF_UPROBE_GET_PC. As for others in uprobe/*, seems not necessary.

But there is another reference in tapsets.cxx.

> I tried the patch on FC13 and upstream linus kernel. No building break found.

Yes, but I was referring to the utrace-less uprobes variant.

But anyway, I'd like to understand why this patch makes a difference.
What code behaves differently for a kretprobe_instance* == 0 vs -1, and why?


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http://sourceware.org/bugzilla/show_bug.cgi?id=11641

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